Pulley.



H. J. GILBERT. PULLBY.

Y y APPLICATION FILED .TUNE 8, 1903. i Y1,01),6 14. Patented Dec. 5,1911.

2 SHEETS-SHEET 1.

' ra. I

H. J. GILBERT. PULLBY.

APPLIOATION FILED JUNE 8, 1903.V

1,010,614. y 'Patenteanemwnl 2 SHEETS-SHEET 2.

HENRY J'. GILBERT, OF SAGINAW, MICHIGAN,

PULLEY.

Specification of Letters Patent.

Patented Dee. 5, 1911.

Applieation med June s, 1903. serial No. 160,522.

To all 'whom 'Zt may concern:

Be it known that I, yHENRY J. GILBERT, residing at Saginaw, Saginawcounty,Michi gan., have invented certain new and useful Improvements inPulleys, of which the following is a specification.

My invention relates to pulleys or wheels, and the object thereof'is toprovide an elficient pulley of metal, more particularly sheet metal,suitably shaped and arranged.

My invention maybe embodied in a solid pulley or in a split or sectionalpulley, but for convenience I will describe the same as embodied in apulley of the latter type.

In the drawings Figure. 1 is an elevation of one section or half of apulley embodyingr my invention; Fig. 2 a sectional elevation on lineA-Bof Fig. 1; Figs. 3, and 4 detail views, illustrating a means forsecuringor anchoring the extreme outer ends of the spokes; Fig. 5 a detail of amodied form of such means; Fig. 6 a sectional plan on line C-D of Fi 1;Figs. 7 and 8 detail views of modifie forms of construction of the ,sideplate and hub thimble; and Fig. 9 a perspective of the hub portion andinner end of the spokes of one of the pulley sections.

As herein shown, the rim 1 is infolded at its central portion to form aweb 2 and its edges 3 are preferably rolled inwardly whereby the rim ismaterially strengthened. The spokes 4 are arranged in pairs, face toface, and by preference are provided with a longitudinal rib 5 toincrease the strength thereof. The outer` ends of these spokes aresecured to the web 2 by rivets 6, and theirinner ends are bent atsubstantially right angles to form a portion of the hub structure.

For the purpose of rmly securing or anchoring the outer ends of thespokes tothe web 2 of the rim, a tongue 4a may be pressed or formed fromthe outer end'of each spoke and inwardly directed toward each otherthrough a slot 4b formed in the web. As illustrated in Figs. 3 and 4 thetongues 4a abut each other and being of equal length meet at the centrallineA of the web. However, as illustrated in Fig. 5 the tongues 4c maybe made the full width or thickness of the web and the tongues ofcorresponding spokes may be arranged side by side in a slot in the webof a suliicient length to receive both tongues 4c. This constructionresults in a materialstrengthening of the pulley strain caused bytorsional and centrifugal forces.

Within the inner or hub ends of the spokes is arrangeda hub thimble 8forming the foundation or inner member of the hub, the central portion 9of which thimble is :circumferentially expanded so as to fill theV spacebetween the lower orV inner ends of the spokes, thereby separating andstrengthenlng the same. Two similar substantially semi-circular plates10 are rovided for each pulley section, the same being secured to theouter faces of the spokes by rivets or other- Each plate 10 has anoutwardly diwise. rected semi-circular flange'll, littingpupon the hubportion of the spokes, as clearly shown in Figs. 2 and 9. Each plate hasa series of depressions 12, substantially V- shaped and corresponding inposition and shape with the space between the spokes,

whereby the spokes are eii'ectually braced or` supported at their innerends and relieved of torsional strain. In the present instance theplates v10 are secured to the spokes by ymeans of rivets 13, which alsopass through sides 9a of the expanded portion of the hub thimble may beextended laterally, at intervals, thereby meeting the depressions of theplate 10 (Fig. 7), or, if desired, the plate may be made iat and theexpanded portion of the hub thimble may be extended laterally, atintervals, the full thickness of the spokes, as shown by9b in Fig. 8.

Any suitable clamping mechanism such as the sectional clamps 15 of theordinary and well knownconst'ruction may be employed for clampingthe-hub sections together. f

I claim:

1. A pulley comprising a rim, a series of spokes connected therewith attheir vouter and serves to relievethe rivets 6 of shearing lspokes asshown at 10a in Fig. 7, and the ends and outwardly bent at their innerends to form a hub portion, a hub thimble arranged within the hubportion of the spokes and having` a circumferentially expanded portionextending` between the inner ends of the spokes and secured to suchspokes, and

means for clamping the hub portion of' the spokes and hub thimbletogether.; substantially as described.

2. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent at their inner ends to form a hubportion, a hub thimble arranged within the hub portion of the spokes andhaving a circuinferentially expanded portion extending between the innerends of the spokes and secured to such spokes, plates or rings 10 alsosecured to the spokes, and means for clamping the hub portion of thespokes and hub thimble together; substantially as described.

3. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent at their inner ends to form a hubportion, a hub thimble arranged within the hub portion of the spokes andhaving` a circumferent-ially expanded portion extending between theinner ends of the spokes, plates or rings 10 arranged at the inner endsof the spokes, said expanded portion of the thimble Vand said plateshaving interlocking connection with said spokes, and means for clampingthe hub portion of the spokes and hub thimble together; substantially asdescribed.

t. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent at their inner ends to form a hubportion, a hub thimble arranged within the hub portion of the spokes andhaving a circumferentially expanded portion extending` between the innerends of the spokes, plates or rings 10 arranged at the inner ends of thespokes, said expanded portion of the thimble and said plates havingmeans for distancing the inner ends of the spokes both longitudinally ofthe axis of rotation and angularly thereof, and means for clamping thehub portion of the spokes and hub thimble together; substantially asdescribed.

5. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent at their inner ends to form a hubportion, a hub thimble arranged within the hub lportion of the spokesand having a circumferentially expanded portion extending between theinner ends of the spokes, plates or rings 10 arranged at the inner endsof the spokes, and fastening means passing` through the plates, spokesand expanded portion of the hub thimble for securing said partstogether; substantially as described.

6. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent to form a hub portion, plates 10secured to the outer sides of the spokes and having depressions 12positioned between the spokes and also having flanged portions 11fitting upon and secured to the hub portion of the spoke, and clampsfitting` upon said flanges 11; substantially as described.

7. A pulley comprising a rim, a series of spokes connected therewith attheir outerA ends and outwardly bent to form a hub portion, plates 10secured to the outer sides of the spokes and having flanged portions 11substantially semi-circular and tting upon and secured to the hubportion of the spokes, a hub thimble, means for securing the hubportion, flanged portions 11 and the thimble together, and clampingplates having semicircular' portions fitting over and upon the flangedportion 11 of said plates; substantially as described.

8. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent to form a hub portion, plates 10secured to the spoke and having flanges 11 fitting upon and secured tothe hub portion of the spokes, a hub thimble having a central expandedportion arranged between corresponding spokes, means for securing thehub portion, flanges 11 and thimble together, and clamps fitting overthe flanges 11; substantially as described.

9. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent to form a hub portion, plates 10secured to the spokes and having flanges 11 fitting upon and secured tothe hub portion of the spokes, a hub thimble having a central expandedportion arranged between corresponding spokes, rivets 13 passing throughplates 10, the hub portion of the spokes and said expanded portion ofthe thimble, and clamps fitting over the flanges 11; substantially asdescribed.

10. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends and outwardly bent to form a hub portion, plates 10secured to the outer sides of the spokes and having substantiallyrightangled semi-circular flanges 11 fitting upon and secured to the hubportion of the spokes, sectional clamps, each section thereof comprising a se1ni-circular plate fitting over a flange 11, a hub thimblearranged within the hub portion of the spokes, and rivets 13 securingthe thimble to the spokes; substantially as described.

11. A pulley comprising a rim provided with an inwardly directed webhaving a series of transverse openings, a hub, and spokes arranged inopposing pairs, the inner ends of the spokes being connected with thehub and the outer ends thereof being flanged to engage said openings,the members of each pair entering said openings from opposite sides ofthe web; substantially as de- Y web being provided with a series oftransverse openings at points coincident with the points of attachmentof the spokes, a hub, and spokes connected at their inner ends with thehub and having their other ends ianged to engage said openings in theweb, said spokes being arranged in pairs with the members thereofopposed and having their outer flanged ends entering said openings fromopposite sides of the web; substantially as described.

13. A pulley comprising a rim, a hub thimble, a series of spokesconnected at their outer ends with the rim and connecting at their innerends with the thimble, and plates l0 having substantially radialportions secured to the outer sides of the spokes and each having anoutwardly directed portion fitting upon the inner endsof the spokes,said radial portion being provided with depressions itting between theinner ends of the spokes and fastening means passing through the plates10 and the spokes for fastening them together; substantially asdescribed.

14. A pulley comprising a rim, a hub thimble, a series of spokes,connected at their outer ends with t-he rim and connected at their innerends with the thimble, and plates 10 having depressions fitting betweenthe inner ends of the spokes, each of said plates being provided with asubstantially radial portion secured to the outer sides of the spokes,and with a lateral portion or flange 11 which is substantiallysemi-circular and parallel with the axis of rotation, said flangeconstituting apart of the hub structure; substantially as described.

15. A pulley comprising a rim, a series of spokes connected therewith attheirV outer endsy and outwardly bent at their inner ends to form ayhubportion,.-a hub thimble arranged Within the hub portion of the spokesand Vhaving a hollow portion which isV circumferentially expanded fromthe body of such thimble, such expanded portion extending betvveen theinner ends of the spokes, rivets passing through opposite spokes andthrough such expanded portion for securing such parts together, andmeans for clamping the hub portion of the spokes and hub thimbletogether; substantially as described.

16. A pulley comprising a rim, a series of spokes connected therewith attheir outer ends, a hub thimble coperating with the inner ends of saidspokes and two pairs of separate plates 10 secured respectively to theouter sides of the spokes and having depressions fitting between theinner ends of adjacent spokes and interlocking with them each of saidplates lO having a lateral extension or flange which is semi-circular inform and fits over the hub thimble, and Vrivets passing through theplates 10 and the HENRY J. GILBERT.

Witnesses:

S. E. HIBBEN, LoUIs B. ERwIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

